Change of largest shareholder

What happened

Change of Largest Shareholder

1. Details of change: Before, Largest shareholder, etc.: Jeong Jin-seop and 2 others; shares held: 7,528,273; ownership (%): 27.56 After, Largest shareholder, etc.: Jeong Ju-yeong and 3 others; shares held: 7,528,273; ownership (%): 27.56

2. Reason for change: Change of largest shareholder due to a gift between the existing largest shareholder and the recipient. - Donor: Jeong Jin-seop - Recipient: Jeong Ju-yeong - Change due to acquisition of forfeited shares: No - Lock-up obligation on transferred shares: No

3. Purpose of equity acquisition: - - Method of funding the acquisition: Own funds (KRW): -; Borrowed funds (KRW): -; Lender: -; Loan period: - to -; Collateral: - - Plan to appoint/dismiss officers after the acquisition: -

4. Change date: 2026-09-01

5. Confirmation date of change: 2026-09-01

6. Other matters for investment reference: 1. This disclosure concerns a change of largest shareholder due to a gift between the existing largest shareholder and the recipient; there is no change in the number of shares held or ownership percentage of the largest shareholder, etc. 2. The ownership percentages (%) stated in "1. Details of change" above and in "Details of Change" below are calculated based on 27,312,880 shares, being the total shares issued (31,422,383 shares) less treasury shares (4,109,503 shares). 3. "4. Change date" and "5. Confirmation date of change" above are the date of the share gift. 4. The method of the share gift was a transfer between securities company accounts.

Related disclosures: -

[Details of Change] Name (corporation/association/other entity name): Jeong Jin-seop; Relationship: Largest shareholder before change; Before, shares: 7,528,273, ownership: 27.56%; After, shares: 1,528,273, ownership: 5.60%; Note: Donor Name: Jeong Ju-yeong; Relationship: Largest shareholder after change; Before, shares: 0, ownership: 0%; After, shares: 6,000,000, ownership: 21.97%; Note: Recipient Name: Song Gyu-heon; Relationship: Related party of the largest shareholder before change; Before, shares: 65,397, ownership: 0.24%; After, shares: 65,397, ownership: 0.24%; Note: Related party both before and after change Name: Dynacomics; Relationship: Related party of the largest shareholder before change; Before, shares: 1,072,000, ownership: 3.92%; After, shares: 1,072,000, ownership: 3.92%; Note: Related party both before and after change

[Matters Concerning the New Largest Shareholder (Individual)]

1. Basic information of the individual: Name: Jeong Ju-yeong Nationality: Republic of Korea

- Officer career history of the individual: Name: Jeong Ju-yeong; Company: Openbase; Listed: Listed (KOSDAQ); Delisting date (if delisted): -; Position: Inside director; Date joined: 2024-07-01; Date left: -; Note: -

- History as largest shareholder of listed companies (individual): Name: Jeong Ju-yeong; Company: Openbase; Listed: Listed (KOSDAQ); Delisting date: -; Period as largest shareholder: start 2026-09-01, end -; Note: -

2. Relationship between the listed company and the largest shareholder (individual): Inside director

3. Transactions between the listed company and the largest shareholder (individual) over the past 3 years (excluding routine transactions): Current year: -; Prior year: -; Year before that: -